[Analyzing the various Prospects of the Pre-Timed arterial traffic Control System on the Roads in the City of Portharcourt, Riverstate, Nigeria]

By

ACKNOWLEDGEMENT

I would like to take this chance for thanking my research facilitator, friends & family for support they provided & their belief in me as well as guidance they provided without which I would have never been able to do this research.



DECLARATION

I, (), would like to declare that all contents included in this thesis/dissertation stand for my individual work without any aid, & this thesis/dissertation has not been submitted for any examination at academic as well as professional level previously. It is also representing my very own views & not essentially which are associated with university.

Signature:

ACKNOWLEDGEMENT2

DECLARATION3

CHAPTER 1: INTRODUCTION6

Background of the Study6

Significance of the Study6

Aim and Objective of the Study7

CHAPTER 2: LITERATURE REIVEW8

Road Development in Nigeria8

Review from Previous Works10

Delay at signalized intersections10

Performance Measures15

Loop Detectors16

Congestion18

Travel Time21

Signal Coordination25

CHAPTER 3: METHODOLOGY FOR MODELLING26

Phases28

Turning probabilities28

Boundary conditions29

Steady-State Stochastic Delay Models35

Time-Dependent Stochastic Delay Models for Under-Saturated36

Microscopic Simulation Delay Models41

Test Scenario42

CHAPTER 4: DISCUSSION AND RESULTS44

Test Results44

Consistency of Delay Estimates for Under-Saturated Conditions45

Consistency of Delay Estimates for Over-Saturated Conditions51

Actuated Traffic Signal Control52

Fixed Cycle Length Coordination54

Limitations of Fixed Cycle Coordination55

Self Organization59

Actuated Control's Self Organizing Potential60

Actuated Signal Control61

PreTimed Signal Control62

CoordinatedActuated Signal Control66

Adaptive Traffic Control Systems68

Adaptive Traffic Control Systems (ATCSs) with Fixed Cycle69

Method for Optimization of Traffic Signals in Online-Controlled Network 70

Oversaturation Logic under ATCSs with Fixed Cycle Length72

Transit Signal Priority (TSP) Logic under ATCSs with Fixed Cycle Length73

Real-Time Hierarchical Optimized Distributed Effective System (RHODES)74

Urban Traffic Optimization by Integrated Automation (UTOPIA) / System for Priority and Optimization of Traffic (SPOT)76

INSYNC77

Self-Organizing Traffic Signals (SOTL)80

Transit Signal Priority (TSP) Logic under ATCSs82

CHAPTER 5: CONCLUSIONS84

REFERENCES86

CHAPTER 1: INTRODUCTION

Background of the Study

Traffic-signal control systems coordinate individual traffic signals to achieve network-wide traffic operations objectives. These systems consist of intersection traffic signals, a communications network to tie them together, and a central computer or network of computers to manage the system. Coordination can be implemented through a number of techniques including time-base and hardwired interconnection methods. Coordination of traffic signals across agencies requires the development of data sharing and traffic signal control agreements. Therefore, a critical institutional component of Traffic Signal Control is the establishment of formal or informal arrangements to share traffic control information as well as actual control of traffic signal operation across jurisdictions.

Signal coordination systems are installed to provide access. A traffic-signal system has no other purpose than to deliver favourable signal timings to motorists. The system provides features that improve the traffic engineer's ability to achieve this goal. These are primarily access features. They provide access to the intersection signal controller for maintenance and operations. The more complete and convenient the access, the more efficient the operator will be and the more effective the system.

Significance of the Study

The design, analysis, and evaluation of intelligent transportation systems (ITS) require a good knowledge of traffic flow (pedestrian and vehicular) modeling and control techniques as well as of powerful methodologies from the areas of optimisation, control, networks, and dynamic ...